Qust al-Hindi (Indian Costus): Hadith, Traditional Uses and Safety
Qust al-Hindi — Indian costus — is one of the few remedies the Prophet ﷺ named directly, and one of the most commonly misidentified products sold under a Prophetic label today. This guide covers what the plant actually is, what the authenticated narrations say and do not say, how it was traditionally prepared, and the modern safety questions that matter before anyone considers using it.
Medical disclaimer. This article is educational and is not medical advice. Qust al-Hindi is a potent botanical with known toxicity concerns in some species, and it can interact with medication. Speak to a qualified doctor before using any herbal remedy, and never delay conventional treatment for a serious condition.
What Is Qust al-Hindi?
Qust (قُسط) is the classical Arabic name for an aromatic root used across the Arabian, Indian, Persian and Greek medical traditions. Two varieties are distinguished in the sources:
- Qust al-Hindi (قُسط هندي) — "Indian costus," the darker, more bitter root, generally identified with Saussurea costus (formerly Saussurea lappa), a Himalayan plant. Also called kust, kuth, or pushkarmool in some South Asian traditions.
- Qust al-Bahri (قُسط بحري) — "sea costus," the lighter, milder, sweeter root, most often identified with Aucklandia lappa or in some regions with white sandalwood-adjacent aromatic roots.
Classical scholars including Ibn al-Qayyim in Zad al-Ma'ad treated both as the same remedy in different grades, with al-Bahri regarded as gentler and al-Hindi as stronger and more heating.
An identification problem worth knowing about
Saussurea costus is listed on CITES Appendix I, meaning international commercial trade in wild-harvested material is prohibited. In practice this means much of what is sold online as "qust al-Hindi" is either cultivated material, a substitute species, or adulterated powder. Buyers cannot verify species from a bag of ground root, and mislabelling is common enough that it should be assumed rather than treated as an exception.
The Hadith on Qust
The central narration is reported by Umm Qais bint Mihsan (رضي الله عنها):
"You should use this Indian aloeswood (al-'ud al-Hindi), for it contains seven types of cure. It is sniffed for a throat infection ('udhrah) and put into the side of the mouth for pleurisy." — Sahih al-Bukhari 5692; Sahih Muslim 2214.
The commentators — including Ibn Hajar in Fath al-Bari — state that the 'ud al-Hindi in this narration refers to qust, not to the fragrant agarwood also called 'ud. A parallel wording appears explicitly as qust:
"The best of what you treat yourselves with is cupping (hijama) and qust al-bahri." — Sahih al-Bukhari 5696; Sahih Muslim 1577.
Reading these narrations carefully
Four points are consistently blurred in popular content about qust al-Hindi:
- "Seven types of cure" is not a list of seven diseases. The narration names two applications — sniffing for a throat complaint, and application in the mouth for pleurisy. The number seven is not itemised in the hadith itself, and the long condition lists circulated online (cancer, infertility, autism, and so on) have no basis in the narration.
- The hadith about 'udhrah concerns a specific childhood throat swelling. It was cited in the context of discouraging a harsher folk practice of pressing the child's palate. The point of the narration is partly to redirect people away from a harmful custom.
- Al-Bahri is the variety named in the cupping hadith, though scholars treated the two as interchangeable in kind.
- A remedy being mentioned in an authentic hadith establishes that its use is permissible and was recommended in a specific context. It does not establish a dosage, a modern indication, or an efficacy claim. Those are separate questions with separate evidence.
For how to check a narration yourself, see the guide on verifying authentic Islamic remedies.
Traditional Preparation Methods
Classical and folk usage of qust falls into a small number of forms. These are described here as historical practice, not as instructions.
Ground and inhaled (sa'ut)
The dried root was ground to a fine powder and a very small quantity sniffed, or suspended in water or olive oil and administered as nasal drops. This is the 'udhrah application described in the hadith.
Taken in the mouth
Powder was mixed with honey or olive oil into a paste and placed at the side of the mouth, or taken as a small quantity of powder with water. Honey was the usual carrier — see the article on honey in Prophetic medicine.
As a decoction
Chips of root were simmered in water and the strained liquid drunk warm, a preparation shared with Unani and Ayurvedic practice, where the plant is kushta / kuth.
Applied topically
A paste of powder with oil was applied to the skin for blemishes and inflammatory complaints. In Unani medicine the root was also used in massage oils.
Burned as incense
Qust was and is burned as a fumigant. This overlaps with, but is distinct from, the aromatic agarwood 'ud used purely as perfume.
What Modern Research Does and Does Not Show
Saussurea costus has been studied chiefly for costunolide and dehydrocostus lactone, two sesquiterpene lactones. Laboratory work reports anti-inflammatory, antimicrobial and cytotoxic activity for these compounds in cell cultures and animal models.
Three caveats matter more than the findings:
- Almost all of it is preclinical. Activity in a cell line is a reason to investigate a compound, not evidence that a powdered root taken by mouth treats a disease in a person.
- Sesquiterpene lactones are a known allergen class. They are the compounds responsible for contact dermatitis from the daisy family, and costus root oil is a recognised sensitiser — restricted in cosmetics in the EU for exactly this reason.
- Aristolochic acid contamination is a documented hazard. Some material traded regionally as costus or under related vernacular names has been found adulterated with Aristolochia species, which cause irreversible kidney damage and urothelial cancer. This is a supply-chain problem, not a property of the correct plant, but it is the single most serious risk attached to buying this root.
Safety Precautions
- Do not use during pregnancy or breastfeeding. Traditional sources describe the root as emmenagogic; there is no safety data supporting use in pregnancy.
- Avoid with known Asteraceae allergy (ragweed, chrysanthemum, chamomile, echinacea) — cross-reactivity with sesquiterpene lactones is well documented.
- Kidney and liver conditions are a reason to avoid it entirely, given the adulteration risk described above.
- Anticoagulants, immunosuppressants, and diabetes medication — no reliable interaction data exists, which is itself a reason for caution rather than reassurance.
- Children. The classical 'udhrah narration concerns children, but modern paediatric use of an unstandardised powdered root with an allergen profile is a different proposition. Discuss any childhood throat complaint with a doctor.
- Sourcing. Prefer suppliers who name the botanical species, state the country of cultivation, and provide third-party testing. Absence of these is not a neutral signal.
- A persistent sore throat, breathing difficulty, or chest pain needs medical assessment, not a home remedy. Pleurisy — the second application in the hadith — is a symptom of underlying disease that requires diagnosis.
For general rules on herbal risk, dosage and interactions, see the herbal medicine safety guide.
Where Qust Fits in Prophetic Medicine
Qust sits alongside black seed, honey, dates, olive oil and cupping in the body of remedies named directly in the Quran or authenticated Sunnah. It differs from most of them in one important respect: honey, dates and olive oil are foods with wide safety margins, whereas qust is a pharmacologically active root with a real toxicity and adulteration profile.
That distinction is the honest takeaway. The narration is authentic and its status as part of the Sunnah is not in question. What follows from that is permissibility and merit in the specific uses described — not the open-ended therapeutic claims made for it in the modern supplement market.
For the wider context, the Prophetic medicine hub collects every article on the subject in reading order.